The Pre-Build Survey Specialist in Cobham
Essential drainage diagnostics and mapping for Cobham extensions and new builds. Secure your Thames Water build-over agreement with Cobham’s technical experts.
- ◉ Building Control Compliant
- ◉ Precision Depth & Invert Level Data
- ◉ Fast-Track Reports for Cobham Developers
100% Approval
Our reports are designed to meet all Cobham local Council planning criteria.
3-Metre Rule
Expert identification of any public sewers within the critical Cobham build zone.
£5M Insurance
Fully insured for all pre-construction and site works within the Cobham area.
Technical Foundations for Cobham Construction.
In a town with as much development as Cobham, from modern urban expansions to sensitive suburban renovations, a Pre-Build Survey is the most critical step in your project’s lifecycle. Building over or near a sewer without professional documentation is a legal and structural risk. Our surveys provide the precise underground intelligence required to protect Cobham’s infrastructure and your investment. We identify the exact location, depth, and condition of pipes, ensuring your foundations are designed correctly and your Cobham planning application proceeds without a hitch.
Specialized Pre-purchase Drain Survey for Cobham Buyers
We offer a suite of specialized investigations that fulfill the rigorous technical requirements of Cobham structural engineers and water authorities.

Build-Over CCTV Inspection
The "Before" report required by Thames Water for Cobham properties, documenting the structural integrity of the sewer before any groundworks begin.
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Depth & Invert Level Verification
We provide the exact measurements Cobham architects need to calculate foundation depths and avoid crushing local drainage lines.
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Public Sewer Identification
Determining exactly which pipes are your responsibility and which are Cobham’s public assets—a critical distinction for legal build-over agreements.
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Load-Bearing Site Mapping
Mapping the drainage network to ensure Cobham new-build loads are distributed safely, preventing future pipe collapses or subsidence.
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Pre-Construction Structural Audit
A full condition assessment of Cobham pipes to identify existing cracks or leaks that must be resolved before construction equipment arrives on-site.
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The "No-Dig" Solution for Cobham Developers
Our solution focuses on deliveringthe hhighest-resolutiondata with zero site disruption. We ensure your Cobham construction project meets all Part H Building Regulations through non-invasive, high-speed diagnostics.
- ◉ Precision Sonde tracing to identify pipe direction on Cobham sites.
- ◉ Detailed WinCan reports accepted by Cobham's legal and water authorities.
- ◉ Technical advice on pipe protection and diversion for Cobham builds.
Non-Invasive Site Intelligence
Our Pre-Build Survey is entirely trenchless, using advanced camera technology to explore your Cobham site without disturbing the ground.
Cobham Site Prep
We identify all access points and map the build-zone relative to existing Cobham sewer assets.
Our engineer arrives at your Cobham address equipped with the latest CCTV technology.
HD CCTV Exploration
High-resolution cameras are inserted to document every joint, crack, and connection in the Cobham network.
Data Package Delivery
You receive a professional report containing HD video, site maps, and depth data for your Cobham build-over application.
What Our Customers Say
Daniel K., Cobham Architect
"Highly Efficient. We needed a Pre-Build Survey for a Cobham town-center project. They coordinated with the agent and delivered the Thames Water-ready report in 24 hours."
Megan R., Cobham Homeowner
"Peace of Mind. Our Cobham builder insisted on a survey before our extension. The team found a collapsed pipe we didn't know about, saving us thousands in potential damage."
Simon V., Cobham Project Manager
"Professional Data. Their mapping was millimeter-perfect. Essential for any developer working in the Cobham area who wants to avoid planning delays."
Why Choose Us?
We are Cobham’s leading pre-construction drainage authority. Our team provides the specialized technical data that Cobham’s professional building sector demands for every project.
Cobham Infrastructure Knowledge
Our engineers have years of experience working with Cobham’s unique drainage topography, ensuring we find assets that generic firms miss.
Advanced Diagnostic Equipment
We use the latest HD crawler cameras and sonar locators to ensure your Pre-Build Survey is the most accurate in the Cobham area.
Solicitor & Authority Approved
Our reports are specifically formatted to be accepted by Cobham local Council and Thames Water, streamlining your build-over agreement.
Fixed Cobham Pricing
We provide transparent, upfront quotes for all Cobham projects, ensuring you can budget for your survey without hidden "emergency" fees.
Rapid Site Turnaround
We know Cobham construction schedules are tight. We offer priority booking for pre-build projects to keep your development on track.
End-to-End Compliance
From initial tracing to final "post-build" verification, we handle the entire compliance process for Cobham developers and homeowners.
Secure Your Cobham Build-Over Approval.
Get the professional drainage data your Cobham project needs. Book your survey today.
Frequently Asked Questions
Why do I need a Pre-Build Survey for my Cobham extension?
A Build-Over Agreement is required if you are building within 3m of a public sewer in Cobham. It protects you and the water authority.
Will this survey satisfy Thames Water in Cobham?
Yes. We use WinCan reporting software, which is the industry standard accepted by Thames Water and Cobham building control.
What happens if you find damage during the Cobham survey?
We will provide a clear HD video of the damage and a fixed-price quote to repair it before your Cobham build commences.
Do I need a post-build survey as well in Cobham?
Often, yes. Water authorities in Cobham may require a “Post-Build” check to ensure your construction hasn’t damaged the sewer.
How long is a Pre-Build Survey valid for in Cobham?
Usually, these surveys are valid for 12 months, provided no significant groundworks have occurred on your Cobham site since the check.
Can you trace the depth of the pipe for my Cobham structural engineer?
Absolutely. Our Sonde and Trace technology provides the exact depth data Cobham engineers need for footing designs.
Do you work with Cobham-based architects?
Yes, we are the preferred drainage partner for many architectural firms across the Cobham area for all pre-construction works.
Is the survey messy or disruptive to my Cobham property?
Not at all. It is entirely non-invasive. We access the pipes through existing manholes on your Cobham site.
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We proudly serve
- • Kingston Upon Thames
- • New Malden
- • Worcester Park
- • Surbiton
- • Thames Ditton
- • Molesey
- • Chessington
- • Esher
- • Cobham
- • Walton On Thames
- • Weybridge
- • Byfleet
- • Addlestone
- • Chertsey
- • Epsom
- • Tadworth
- • Ashtead
- • Leatherhead
and all surrounding Area.